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    <title>Document</title>
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    <script>
          /* 
      - 使用function* 可以声明一个generator状态机对象,yield关键字用来定义一个个的状态
      - 调用generator函数后返回一个iterator对象,每次调用iterator对象上的next方法,可以执行一个yield后的状态
    */

    function* generator(){
        yield console.log(1);
        yield console.log(2);
        yield console.log(3);
        yield console.log(4);
        yield console.log(5);
    }

    const gen =generator();
    console.log(gen);
    //调用next方法才继续执行
    gen.next();
    gen.next();
    gen.next();
    </script>
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